90 lines
2.5 KiB
C#
90 lines
2.5 KiB
C#
using System;
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using System.Collections.Generic;
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using System.ComponentModel.DataAnnotations;
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using System.Drawing;
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using System.Linq;
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namespace Shapes
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{
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public class Triangle : Shape
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{
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public sealed override List<Point> Points { get; }
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public override double Height { get; }
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public override double Width { get; }
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public sealed override Point CenterPoint { get; }
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public List<Line> Lines { get; }
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public Triangle(Point point1, Point point2, Point point3)
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{
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Points = new List<Point>();
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Lines = new List<Line>();
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Points.Add(point1);
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Points.Add(point2);
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Points.Add(point3);
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Lines.Add(new Line(point1, point2));
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Lines.Add(new Line(point2, point3));
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Lines.Add(new Line(point3, point1));
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Point centerOfLine3 = ((point1 - point3) / 2) + point1;
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var centerTriangle = ((point1 - centerOfLine3) / 2) + point1;
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CenterPoint = centerTriangle;
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Height = new Line(point1, centerOfLine3).ComputeLength();
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Width = new Line(point1, point2).ComputeLength();
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}
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public Triangle(double x1, double y1, double x2, double y2, double x3, double y3)
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{
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var point1 = new Point(x1, y1);
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var point2 = new Point(x2, y2);
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var point3 = new Point(x3, y3);
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Points = new List<Point>();
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Lines = new List<Line>();
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Points.Add(point1);
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Points.Add(point2);
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Points.Add(point3);
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Lines.Add(new Line(point1, point2));
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Lines.Add(new Line(point2, point3));
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Lines.Add(new Line(point3, point1));
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Point centerOfLine3 = ((point1 - point3) / 2) + point1;
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var centerTriangle = ((point1 - centerOfLine3) / 2) + point1;
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CenterPoint = centerTriangle;
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}
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public override double ComputeArea()
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{
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var a = Lines[0].ComputeLength();
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var b = Lines[1].ComputeLength();
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var c = Lines[2].ComputeLength();
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var p = (a + b + c) / 2;
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return Math.Sqrt(p * (p - a) * (p - b) * (p - c));
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}
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public override void Scale(double scaleFactor)
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{
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foreach (var point in Points)
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{
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point.X *= scaleFactor;
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point.Y *= scaleFactor;
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}
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}
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}
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} |